Internal combustion engine



FIG. 1 is a front, plan and right side perspective view of the internal combustion engine showing our new design, the dashed lines forming no part of such design;

FIG. 2 is a rear, plan and left side perspective view, the dashed lines forming no part of such design,

FIG. 3 is a front view thereof, the dashed lines forming no part of such design;

FIG. 4 is an rear view thereof, the dashed lines forming no part of such design;

FIG. 5 is a plan view thereof, the dashed lines forming no part of such design;

FIG. 6 is a bottom rear view thereof, the dashed lines forming no part of such design;

FIG. 7 is a left side view thereof, the dashed lines forming no part of such design; and,

FIG. 8 is a right side view thereof, the dashed lines forming no part of such design. 

The ornamental design for the internal combustion engine, as shown and described. 